[theorique]

There's no racism like the racism of respectable, middle-class blacks against the "thug class" of lower-class blacks. Chris Rock had a routine about it which I will not repeat.

[omonra]

Wait, how can feelings of member of same ethnic group towards each other be classified as racism?

[theorique]

Some people refer to it as "internalized racism".

https://en.wikipedia.org/wiki/Internalized_racism

It's a bit different from having prejudice against a "different" group, but related.